Army Base Realignment and Closure

Umatilla Chemical Depot


BRAC Summary: The 2005 Base Closure and Realignment Commission recommendation directing the closure of Umatilla Chemical Depot (UMCD), OR was conditional on completion of the chemical demilitarization (demil) mission in accordance with Treaty obligations. In September 2011, OSD made the determination that, since the demil mission would not be complete by the 15 September 2011 statutory end date for BRAC 2005, that Umatilla would not close under BRAC. Subsequent to the end of the BRAC 2005, the Defense Authorization Act FY2012 was enacted and included language directing the Secretary of the Army to close Umatilla Chemical Depot, Oregon, not later than one year after the completion of chemical demilitarization activities required under the Chemical Weapons Convention. The legislation also stated that SECARMY could retain minimum essential ranges, facilities, and training areas at Umatilla Chemical Depot as a training enclave for the reserve components of the Armed Forces to permit the conduct of individual and annual training. The demil mission was completed in October 2011 and the Depot closed effective 1 August 2012.

Property Description: The Depot is located on 19,729 acres in Umatilla and Morrow Counties in northeastern Oregon, approximately three miles south of the Columbia River and 180 miles east of Portland. The installation has approximately 1,347 structures of which 1,001 are Ammunition storage igloos. Many of the old WWII era buildings and facilities are in disrepair and are unusable. The UMCDF incinerator complex was built in 1997-2004 and is a modern industrial complex of buildings on the installation. The main incinerator buildings in this complex will be razed IAW the RCRA permits the remaining infrastructure of the site and buildings will remain for future development. There are over 194 miles of paved roads and 51 miles of light rail (no longer usable). The installation consists of an admin area, the ammunition maintenance and storage areas, general commodities warehouses, the Ammunition Demolition Area, and a range complex.

Conveyance Summary:
Starting Acres: 9,648.72
Remaining Acres: 28.08
Conveyed Acres: 9,620.64

Local Redevelopment Authority:
Columbia Development Authority
Court House 216 SE 4th St
Pendleton Oregon 97801
(541) 278-6201
http://www.umadra.com

Last Page Update: July 14, 2026